메타데이터
| 항목 |
값 |
| Designation |
C/1999 F1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-02-13T15:27:28.321920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
166 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
7.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2001-05-25.0000000 |
| e |
0.99912952 |
| q (au) |
5.787019 |
| a (au) |
6648.103893 |
| i (deg) |
92.035388 |
| Ω (om, deg) |
20.023133 |
| ω (w, deg) |
255.157504 |
| M (ma, deg) |
359.999519 |
밝기
산란 + 전체 선형
$$
M_a = (0.773 + 5.058\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
0.773 |
| n |
5.058 |
| gf |
0.999 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 1999-03-13 |
2002-01-17 |
+0.3100 |
-0.124 |
| 2002-02-15 |
2005-08-28 |
-0.2027 |
-0.528 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:17:47.77 |
+36:17:52.6 |
HIP 1403 |
15.44 |
| 2026-06-01 12:00 |
00:17:48.93 |
+36:18:22.1 |
HIP 1403 |
15.00 |
| 2026-06-02 00:00 |
00:17:50.07 |
+36:18:51.7 |
HIP 1403 |
14.57 |
| 2026-06-02 12:00 |
00:17:51.19 |
+36:19:21.2 |
HIP 1403 |
14.15 |
| 2026-06-03 00:00 |
00:17:52.28 |
+36:19:50.7 |
HIP 1403 |
13.74 |
| 2026-06-03 12:00 |
00:17:53.35 |
+36:20:20.1 |
HIP 1403 |
13.33 |
| 2026-06-04 00:00 |
00:17:54.39 |
+36:20:49.6 |
HIP 1403 |
12.93 |
| 2026-06-04 12:00 |
00:17:55.41 |
+36:21:19.0 |
HIP 1403 |
12.54 |
| 2026-06-05 00:00 |
00:17:56.41 |
+36:21:48.4 |
HIP 1403 |
12.16 |
| 2026-06-05 12:00 |
00:17:57.38 |
+36:22:17.7 |
HIP 1403 |
11.79 |
| 2026-06-06 00:00 |
00:17:58.33 |
+36:22:47.0 |
HIP 1403 |
11.44 |
| 2026-06-06 12:00 |
00:17:59.25 |
+36:23:16.3 |
HIP 1403 |
11.09 |
| 2026-06-07 00:00 |
00:18:00.15 |
+36:23:45.6 |
HIP 1403 |
10.75 |
| 2026-06-07 12:00 |
00:18:01.02 |
+36:24:14.8 |
HIP 1403 |
10.43 |
| 2026-06-08 00:00 |
00:18:01.87 |
+36:24:44.0 |
HIP 1403 |
10.12 |
| 2026-06-08 12:00 |
00:18:02.70 |
+36:25:13.1 |
HIP 1403 |
9.82 |
| 2026-06-09 00:00 |
00:18:03.50 |
+36:25:42.2 |
HIP 1403 |
9.54 |
| 2026-06-09 12:00 |
00:18:04.27 |
+36:26:11.3 |
HIP 1403 |
9.28 |
| 2026-06-10 00:00 |
00:18:05.02 |
+36:26:40.3 |
HIP 1403 |
9.04 |
| 2026-06-10 12:00 |
00:18:05.75 |
+36:27:09.2 |
HIP 1403 |
8.81 |
| 2026-06-11 00:00 |
00:18:06.45 |
+36:27:38.1 |
HIP 1403 |
8.61 |
| 2026-06-11 12:00 |
00:18:07.12 |
+36:28:07.0 |
HIP 1403 |
8.43 |
| 2026-06-12 00:00 |
00:18:07.77 |
+36:28:35.8 |
HIP 1403 |
8.27 |
| 2026-06-12 12:00 |
00:18:08.40 |
+36:29:04.6 |
HIP 1403 |
8.13 |
| 2026-06-13 00:00 |
00:18:09.00 |
+36:29:33.2 |
HIP 1403 |
8.01 |
| 2026-06-13 12:00 |
00:18:09.57 |
+36:30:01.9 |
HIP 1403 |
7.93 |
| 2026-06-14 00:00 |
00:18:10.12 |
+36:30:30.5 |
HIP 1403 |
7.86 |
| 2026-06-14 12:00 |
00:18:10.64 |
+36:30:59.0 |
HIP 1403 |
7.82 |
| 2026-06-15 00:00 |
00:18:11.13 |
+36:31:27.4 |
HIP 1403 |
7.81 |
| 2026-06-15 12:00 |
00:18:11.60 |
+36:31:55.8 |
HIP 1403 |
7.82 |
| 2026-06-16 00:00 |
00:18:12.05 |
+36:32:24.1 |
HIP 1403 |
7.86 |
| 2026-06-16 12:00 |
00:18:12.46 |
+36:32:52.3 |
HIP 1403 |
7.92 |
| 2026-06-17 00:00 |
00:18:12.86 |
+36:33:20.5 |
HIP 1403 |
8.00 |
| 2026-06-17 12:00 |
00:18:13.22 |
+36:33:48.6 |
HIP 1403 |
8.11 |
| 2026-06-18 00:00 |
00:18:13.56 |
+36:34:16.6 |
HIP 1403 |
8.23 |
| 2026-06-18 12:00 |
00:18:13.87 |
+36:34:44.5 |
HIP 1403 |
8.38 |
| 2026-06-19 00:00 |
00:18:14.16 |
+36:35:12.4 |
HIP 1403 |
8.54 |
| 2026-06-19 12:00 |
00:18:14.42 |
+36:35:40.2 |
HIP 1403 |
8.72 |
| 2026-06-20 00:00 |
00:18:14.65 |
+36:36:07.9 |
HIP 1403 |
8.91 |
| 2026-06-20 12:00 |
00:18:14.86 |
+36:36:35.5 |
HIP 1403 |
9.12 |
| 2026-06-21 00:00 |
00:18:15.04 |
+36:37:03.0 |
HIP 1403 |
9.34 |
| 2026-06-21 12:00 |
00:18:15.20 |
+36:37:30.4 |
HIP 1403 |
9.57 |
| 2026-06-22 00:00 |
00:18:15.33 |
+36:37:57.8 |
HIP 1473 |
9.20 |